*{
    box-sizing: border-box;
}
html,body,ul,h3{
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 14px;
}
#div1{
    width:820px;
    height: 389px;
    background-color: #ffffff;
    position: relative;
    margin: 30px 635px;
    overflow: hidden;
}
#div1 ul {
    display: block;
    width: 2500px;
    position: absolute;
    left: 0;
    top: 0;
}

#div1 ul li{
    float: left;
    width: 291px;
    padding-right: 40px;
    height: 389px;
    list-style: none;
    display: inline;
}
#div1 ul li div:nth-child(1){
    width: 100%;
    height: 100px;
    margin-top: 200px;
    position: absolute;
}
#div1 ul li div h3:nth-child(1){
    font-size: 22px;
    position: absolute;
    top: 5px;
    left: 65px;
}
#div1 ul li div button a:nth-child(1) {
    width: 50px;
    height: 30px;
    color: #2b2b2b;
}
#div1 ul li div{
    width: 100%;
    height: 100px;
    margin-top: 200px;
    z-index: 2;
    position: absolute;
    background: #ffffff;
}
#div1 ul li div h3{
    font-size: 22px;
    text-align: center;
    margin-top: 10px;
    position: absolute;
    top: 20px;
    left: 90px;
}
#div1 ul li div button a{
    width: 50px;
    height: 30px;
    color: #2b2b2b;
}
#div1 ul li div p {
    text-align: center;
    position: absolute;
    top: 5px;
    left: 85px;
}
#div1 ul li img {
    z-index: -1;
}
.div2 img:nth-child(1){
    position: absolute;
    top: 850px;
    left: 78%;

}
.div2 img:nth-child(2){
    position: absolute;
    top: 850px;
    left: 30%;

}
.dl1{
    width: 178px;
    height: 470px;
    position: absolute;
    top: 173px;
    left: 460px;
}
#div1 ul li:nth-child(1){
    margin: 0;
}
#div1 ul li img{
    width: 251px;
    height: 389px;
}
.dl1 dl dd:nth-child(1){
    font-size: 22px;
    color: #8c8c8c;
    margin-bottom: 10px;
}
.dl1 dl:nth-child(1){
    margin-top: 0;
}
.navber {
    width: 990px;
    height: 450px;
}
.navber dl dd a{
    font-size: 13px;
    color: #8c8c8c;
    line-height: 25px;
}
.navber dl {
    margin-top: 25px;
}
.div-3 {
    width: 812px;
    height: 692px;
    margin-left: 33.5%;
}
.div-3 h2 {
    text-align: center;
}
.div-3 .yishou{
    width: 100%;
    height: 295px;
    padding-bottom: 52px;
    margin-top: 30px;
}
.div-3 .dirst {
    width: 100%;
    height: 243px;
    padding-bottom: 52px;
    background-image: url('http://www.yishion.com/uploadfiles/813x233/201605280930193019.jpg');
    background-size: auto;
}
.footer{
    position: absolute;
    top: 1180px;
}